tda1302 NXP Semiconductors, tda1302 Datasheet - Page 8

• Manufacturer Part Number: tda1302
• Description: Tda1302t Data Amplifier And Laser Supply Circuit For Cd Player And Read Only Optical Systems
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes to the characteristics
1. The maximum input current is defined as the current in which the gain reaches its minimum. Increasing the supply
2. The gain increases if a larger supply voltage is used (see also Fig.6).
3. I
4. Transresistance 120 k means LOW gain, selected if HG = logic 0 (see Table 1).
5. Transresistance 240 k means HIGH gain, selected if HG = logic 1 (see Table 1).
6. Output voltage swing will be: V
7. Refers to equalized output only.
8.
Transfer function
The equalized amplifier including C
only and ‘rf’ refers to equalized and not equalized outputs.
F
F
The denominator forms the denominator of a Bessel low-pass filter.
Table 2 Transresistance.
September 1994
k
Q
R
R
C
OR SINGLE SPEED
OR DOUBLE SPEED
os
od
Data amplifier and laser supply circuit for
CD player and read only optical systems
V
--------- -
I
RF
ext
ext
V
--------- -
I
csin
csin
voltage to V
is defined up to 1 MHz (see also Fig.7). For double speed the gain ratio is defined as gain difference between 2 MHz
and 200 kHz, while the flatness delay is defined up to 2 MHz.
rfe
/
rfe
csin
For single speed the gain ratio is defined as gain difference between 1 MHz and 100 kHz, while the flatness delay
= 2
1
=
=
=
is the sum of the diode input currents 1 to 4; I
R
R
od
rf
rf
os
/
------------------------------------------------------------------------ -
1
------------------------------------------------------------------------
1
2
SYMBOL
DD
+
+
(SP =
1 Q s
= 5 V increases the maximum input current (see also Figs 4 and 5).
1 Q s
(SP =
1 ks
1 ks
–
–
LOGIC
LOGIC
2
2
od
os
1)
0)
+
+
2
2
s
s
SRRF
ext
os
os
2
2
and R
2
= V
2
od
os
internally defined
internally defined
internally defined
internally defined
see Chapter “Characteristics”
external resistor
external capacitor
RFMO
ext
---------------------- -
1
----------------------------------------- -
1
has the following transfer functions, where ‘rfe’ refers to equalized output
+
+
s
sR
1
= V
ext
1
RFO(p-p)
1
tsin
DESCRIPTION
is the sum of the diode input currents 5 and 6.
----------------------------------------- -
1
C
+
ext
9
.
sR
ext
1
C
ext
4
1.094
0.691
17.6
750
47
TYP.
10
6
Preliminary specification
TDA1302T
rad/s
pF
UNIT
(1)
(2)